加合结晶及其在对苯二甲酸残渣回收中的应用

化工进展

加合结晶及其在对苯二甲酸残渣回收中的应用

彭革1，2，郭霞2，成有为2，李希2

1宁波工程学院化工学院，浙江宁波 315016；2浙江大学化学工程与生物工程学系，浙江杭州 310027

出版日期:2010-09-05 发布日期:2010-09-05

Application of adductive crystallization method for terephthalic acid recovery

PENG Ge1，2，GUO Xia2，CHENG Youwei2，LI Xi2

1 Chemical Engineering College，Ningbo University of Technology，Ningbo 315016，Zhejiang，China；

Online:2010-09-05 Published:2010-09-05

摘要/Abstract

摘要：

加合结晶是一种特殊的结晶分离方法。对苯二甲酸（TA）在某些酰胺类溶剂如N，N-二甲基乙酰胺（DMAC）中的溶解与结晶在恒温条件下即可自发进行，生成的新晶体是TA∶DMAC（mol/mol）为1∶2的溶剂化加合物，溶质与溶剂通过O—H…O的氢键作用结合。这种加合结晶具有高度的选择性，在20～70 ℃，单步结晶即可去除中纯度对苯二甲酸（MTA）残渣中90%～95%的有色杂质，是一种高效的残渣回收方法。

Abstract:

Adductive crystallization is a special separation method. Terephthalic acid（TA）could be dissolved and re-crystallized in certain acylamide solvents such as N，N-dimethylacetamide（DMAC）spontaneously even at constant temperature，solvent adduct crystals could be formed with 1∶2 molar ratio of TA and DMAC through hydrogen bonding. This adductive crystallization method showed a high selectivity in TA recovery from the TA residue of the single-step crystallization，through which the 90%—95% colored impurities initially contained in the residue could be removed.

彭革1，2，郭霞2，成有为2，李希2. 加合结晶及其在对苯二甲酸残渣回收中的应用 [J]. 化工进展.

PENG Ge1，2，GUO Xia2，CHENG Youwei2，LI Xi2. Application of adductive crystallization method for terephthalic acid recovery[J]. Chemical Industry and Engineering Progree.